Zero Volumes Toggle

The "Zero Volumes Toggle" command allows the user to display the null (0)-valued turning volumes and associated arrows.

By (user-defined) default, TIAH may be set up to not display zero values in the intersection volume symbols. The user can enable ⁄ disable the display of the null volumes with this command.

Tip: This function is also useful if the user needs to adjust ⁄ modify the turning volumes manually (usually as a last minute adjustment that does not require a separate traffic model run). In this case, there is not need to re-import all of the values from the intersection volume data files:

1. Use the "Zero Volumes Toggle" function to turn the zero values ON

2. Next use the AutoCAD command "DDATTE" to edit the desired turning volume(s) manually.